﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml;
using System.Data;
using System.IO;

namespace Bainx.Extend
{
    /// <summary>
    /// XML操作控件
    /// </summary>
    public class XmlControl
    {
        /// <summary>
        /// 
        /// </summary>
        protected string strXmlFile;
        /// <summary>
        /// 
        /// </summary>
        protected XmlDocument objXmlDoc = new XmlDocument();
        /// <summary>
        /// 
        /// </summary>
        /// <param name="XmlFile"></param>
        public XmlControl(string XmlFile)
        {
            //
            // TODO: 在这里加入建构函式的程序代码
            //
            try
            {
                objXmlDoc.Load(XmlFile);
            }
            catch (System.Exception ex)
            {
                throw ex;
            }
            strXmlFile = XmlFile;
        }
        /// <summary>
        /// 
        /// </summary>
        /// <param name="XmlPathNode"></param>
        /// <returns></returns>
        public DataView GetData(string XmlPathNode)
        {
            //查找数据。返回一个DataView
            DataSet ds = new DataSet();
            StringReader read = new StringReader(objXmlDoc.SelectSingleNode(XmlPathNode).OuterXml);
            ds.ReadXml(read);
            return ds.Tables[0].DefaultView;
        }
        /// <summary>
        /// 
        /// </summary>
        /// <param name="XmlPathNode"></param>
        /// <param name="Content"></param>
        public void Replace(string XmlPathNode, string Content)
        {
            //更新节点内容。
            objXmlDoc.SelectSingleNode(XmlPathNode).InnerText = Content;
        }
        /// <summary>
        /// 
        /// </summary>
        /// <param name="Node"></param>
        public void Delete(string Node)
        {
            //删除一个节点。
            string mainNode = Node.Substring(0, Node.LastIndexOf("/"));
            objXmlDoc.SelectSingleNode(mainNode).RemoveChild(objXmlDoc.SelectSingleNode(Node));
        }
        /// <summary>
        /// 
        /// </summary>
        /// <param name="MainNode"></param>
        /// <param name="ChildNode"></param>
        /// <param name="Element"></param>
        /// <param name="Content"></param>
        public void InsertNode(string MainNode, string ChildNode, string Element, string Content)
        {
            //插入一节点和此节点的一子节点。
            XmlNode objRootNode = objXmlDoc.SelectSingleNode(MainNode);
            XmlElement objChildNode = objXmlDoc.CreateElement(ChildNode);
            objRootNode.AppendChild(objChildNode);
            XmlElement objElement = objXmlDoc.CreateElement(Element);
            objElement.InnerText = Content;
            objChildNode.AppendChild(objElement);
        }
        /// <summary>
        /// 
        /// </summary>
        /// <param name="MainNode"></param>
        /// <param name="Element"></param>
        /// <param name="Attrib"></param>
        /// <param name="AttribContent"></param>
        /// <param name="Content"></param>
        public void InsertElement(string MainNode, string Element, string Attrib, string AttribContent, string Content)
        {
            //插入一个节点，带一属性。
            XmlNode objNode = objXmlDoc.SelectSingleNode(MainNode);
            XmlElement objElement = objXmlDoc.CreateElement(Element);
            objElement.SetAttribute(Attrib, AttribContent);
            objElement.InnerText = Content;
            objNode.AppendChild(objElement);
        }
        /// <summary>
        /// 
        /// </summary>
        /// <param name="MainNode"></param>
        /// <param name="Element"></param>
        /// <param name="Content"></param>
        public void InsertElement(string MainNode, string Element, string Content)
        {
            //插入一个节点，不带属性。
            XmlNode objNode = objXmlDoc.SelectSingleNode(MainNode);
            XmlElement objElement = objXmlDoc.CreateElement(Element);
            objElement.InnerText = Content;
            objNode.AppendChild(objElement);
        }
        /// <summary>
        /// 
        /// </summary>
        public void Save()
        {
            //保存文檔。
            try
            {
                objXmlDoc.Save(strXmlFile);
            }
            catch (System.Exception ex)
            {
                throw ex;
            }
            objXmlDoc = null;
        }
    }
}
/*
=========================================================

实例应用：

string strXmlFile = Server.MapPath("TestXml.xml");
XmlControl xmlTool = new XmlControl(strXmlFile);

// 数据显视
// dgList.DataSource = xmlTool.GetData("Book/Authors[ISBN=\"0002\"]");
// dgList.DataBind();

// 更新元素内容
// xmlTool.Replace("Book/Authors[ISBN=\"0002\"]/Content","ppppppp");
// xmlTool.Save();

// 添加一个新节点
// xmlTool.InsertNode("Book","Author","ISBN","0004");
// xmlTool.InsertElement("Book/Author[ISBN=\"0004\"]","Content","aaaaaaaaa");
// xmlTool.InsertElement("Book/Author[ISBN=\"0004\"]","Title","Sex","man","iiiiiiii");
// xmlTool.Save();

// 删除一个指定节点的所有内容和属性
// xmlTool.Delete("Book/Author[ISBN=\"0004\"]");
// xmlTool.Save();

// 删除一个指定节点的子节点
// xmlTool.Delete("Book/Authors[ISBN=\"0003\"]");
// xmlTool.Save();

*/